Plant Utilities worked example

Plant Utility Availability at 69% availability and quality factor: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop availability and quality factor to 69%, then walk the calculation through step by step. Estimate effective plant utility support output from operating hours, supported production rate, and availability factor.

The inputs for this scenario

  • Utility operating hours: 700 hr (held at the documented default)
  • Supported production rate: 1,200 units / hr (held at the documented default)
  • Availability and quality factor: 69 % (the input this scenario stresses; the baseline uses 96)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross supported output = utility operating hours × supported production rate.
  • Effective utility supported output works out to 579,600 units / period at these inputs, and this is the headline figure for the scenario.
  • Base rate works out to 840,000 units / period at these inputs.
  • Loss to inefficiency works out to 260,400 units / period at these inputs.
  • Availability and quality factor works out to 69 % at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where availability and quality factor sits at 96% and the headline result is 806,400 units / period, this scenario comes in 28.13% below the baseline at 579,600 units / period.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to availability and quality factor, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It rolls availability and quality into a single percentage, so it will not tell you whether a loss came from downtime, pressure droop, or moisture carryover — diagnose those separately.

Results at a glance

  • Effective utility supported output: 579,600 units / period (headline result)
  • Base rate: 840,000 units / period
  • Loss to inefficiency: 260,400 units / period
  • Availability and quality factor: 69 %

Run it with your numbers

  • To rerun this with your own numbers, open the live Plant Utility Availability calculator, set availability and quality factor to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.